When you think of that city, a gateway to the beautiful Rocky Mountains, what mood or spirit comes to mind? We’re stumped, too, but Chadwick John Friedman isn’t. Friedman, who refers to himself on his website simply as “Chadwick John,” a specialist in emergent digital practices with the University of Denver, has created a device to assess the mood of his buzzing, diverse municipality. With the help of a 3D printer, an Arduino Yún, and Denver-area Twitter users, Friedman designed his Mood of the City 3D printed lamp.